Calculating machine



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CALCULATING MACHINE Filed Sept. 5, 1941 15 She'ets-Sheet '7 April 26, 1949. E. RAcz 2,458,408

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ATTORNEYS April 26, 1949. E. RACZ 2,468,408

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Filed Sept. 3, 1941 INVENTOR BYEres Racz DM/LM] ATTORNEYS Patented Apr. 26, 1949i UN IT STATES PAT E NT O F F IC E 2368.408 GAL'CULATNG MHINE Ernest Baez; Detroit;` Mich., assignor to Burroughs Adding Machine Company, Detroit, Mien., a @animation of Michigan Application S'eptcl'lileh 3, 1941, Serial N0. 409,408 25 claims. (creat- 6018) This invention relates toe:calculating machinev` particularly adapted for posting-- entries in pass` books and the like.

AnI objectfof the invention` is to provide an improvedy calculating-machinewhich canl be used for printing' entries in passbooks and keeping a'4 running record of work performedA on the ma'- chine,l and which isprovided with means' whichu will insure thatr improper' or fraudulententries cannotbemade inthe-passbookor the like with-v outrevealing the fact'-v to they proprietor oi` the inachineor otherperson of supervisory authority.

A--further obiectof the invention is toprovide anI` improved machine for; making-` passbook entries andav running record thereof,which machine may be used'notfonly for postingpassloookv entries' but may; between the making oi pa-ssbookentries,r be-fusedfas an `ordi-nary calculating ma' chine as, for exam-ple.- forl ordinary addition and/or subtraction.- A'further objectistoprovide'v amachine ofy the abovestated characterl which =will automatically-v so differentiate the recordfof the ordinary calcula-ting `operations performedon -the machine Y from -therecord of thepassbookr work` performed bythe machine as vto clearly indica-te. on therunning l record made by' the machine, anyV improper or fraudulent pass-' book-entry;

A further object oi the invention is to provide a-calculatingf'machinewith improved means to guardagainst errors, misoperation's; and fraudulent;` operations.

A :further` object of the inventionvisto provide a 'calculating machinewith improved means facilitating the posting "of passbook entries.

Two embodiments of the invention are illustrated inthe' accompanying drawings in which:

Figure 1' isarightmandside elevation of a calculating machiney with f the invention applied thereto-various parts `being broken away-to illustrate/more clearly parts lwith which theinvention-is concerned; A

Fig. 2 is a detailedperspective'of certain of thev parts shown in-Eig.. 1;v v

Figs. 3 and 3A arearight-hand side elevation ofv theV machine with thecasingv removed and certainp'artslomitted to showy more-particularly' the-drive control meansandcertain other parts with-` which the invention is more particularlyf concerned;

Figari is a right sideelevation -of the paperv carriagewith certain parts omitted or brokenaway toshow moreparticularly'y the passbookM holding means, the l line' spacing means, and the columnartabulatingrmeans;

Figfis -adetail of -a portion of Fig. 4;

Fig. 6Y isI a right side View of some elements of theI machine in the positions they occupy when the paper carriage is positioned for the printing 0i a debit or credit entry in a pa'ssbook;

Fig. 'Tis a-right side elevation of certain'of the partsillustrated iii-Fig. 6, but` showing the posi# tionsof the parts as themachine is conditioned vof preparation of the machine for the taking anciprinting of aneg-ative or overdraft balance;

Figs. l1 and 11A are a left side elevation o f the machine with the casing thereof removed and show portions of the means for preventing incorrect operations of the machine;

Fig. 12 is a right side view of parts of the ma chine concerned with the printing of symbols alongside yof the amounts printed;

Fig. 13 isanfenl-arged4 rig-ht side View of some of the symbol printing control elements;

Fig. 14 isa rear vView of the symbol printing type bar' and of adjacent amount printing type' bars to show the arrangement of the symbols on the'symbol printing type bar;

Fig. l5 is a'right sidev view-of some of the symbol printing control parts in the positions theyv occupy as the machine is operated to print a positive bal-ance in the New Balance column of a passbook;

Fig. 16 is a right side View of some of ythe symbol printing control parts in the positionsy which theyA occupy as the machineis operated to print a total after havingprinted a subtotal balance yin the New Balance column of a passbook;

Fig. lr'llis a right-side View ofsome of the sym; bol printing control parts in the positionsdwhichj they occupy as thejmachine is operated to print` an overdraft or negative balance inA the New Balance?v column-oi a passbook;

Figil is -a'right side view of some of the symbol printing control parts in the positions which*l they occupy as thefmachine is operated to print anegative or overdraft total following the print;- ingf-of Vanl'overdraft balance in the New Balance column of a passbook;

lig. 19 is a right side elevation of portions of a modified form of the invention showing the positions of the parts after the carriage has been moved into the passbook New Balance cel umnar position after the total key has been partially depressed while the carriage was in another columnar position;

Fig. 2O is a detailed view of portions of Fig. 19; I Fig. 21 is a right side elevation of portions of the symbol printing control means of the modied form of the invention showing the parts in their normal positions;

Fig. 22 is a View similar to Fig. 14 but showing the arrangement of the symbol type on the symbol printing type bar for the modied form of the invention;

Fig. 23 is a right side view of some of the symbol printing control elements in the modied form of the invention in the positions which they occupy as the machine is operated to print a positive total after an operation of the machine other than for printing a subtotal in the New Balance column of a passbook;

Fig. 24 shows portions of the control means of the modified form of the invention with the parts in the positions they occupy when the machine is operated for printing a negative total after an operation of the machine other than an operation for printing a subtotal in the New Balance column of a passbook; and

Fig. 25 illustrates samples of work performed on a machine equipped with the invention.

The invention has been illustrated as applied to a Burroughs portable calculating machine of a general construction which, except as herein disclosed, is similar to that disclosed in the Horton Patent 1,853,050 as modified in accordance with the disclosure in the Butler Patent 1,992,142. It will be apparent, however, that the invention may also be embodied in machines of other constructions.

The machine equipped with the present invention has a laterally shiftable paper carriage C (Fig. 1) generally similar to that disclosed in my prior Patent No. 2,317,086, to permit the printing of entries in a plurality of columns. The paper carriage comprises a supporting plate (Figs. 1 and 6) which is supported by anti-friction rollers 5l on a raceway 52 xed to a plate 53 removably mounted on the machine frame. A long spring secured at one end to astud 5S on the righthand end of the raceway 52 passes around a pulley 51 rotatably mounted on the left end of the raceway 52 and is secured at its other end to a stud 58 fixed in the right-hand end of the supporting plate 50 or" the carriage whereby the paper carriage is constantly yieldingly urged to the left as viewed from the front of the machine.

A toothed or notched bar 60 (Figs. l, 4 and 5) supported on the rear of the paper carriage C carries a plurality of clips 6| which project rearwardly from said notched bar 60 to be engaged by the upper end of a pawl 62 secured to a shaft 63 journaled in the rearwardly turned ends of a frame secured to the underside of the raceway 52. The pawl 52 projects downwardly from shaft 63' and its lower end is adapted to cooperate with a pawl 65 pivoted at 66 on a slide 6T. The pawl 65 is urged counterclockwise in Fig. 4 by a spring 68 but is normally held in the position of Fig. 4 by a stud 69 engaging the rear end of the pawl and carried by the lower arm of a lever 10 (Fig. 1) pivoted on the end of the shaft 63. The stud 69 cooperates with a detent lever 'H having two notches, the adjacent edges of which are inclined 4 toward each other. The detent lever is pivoted on a stud 12 on the frame 64 and urged counterclockwise by a spring 13 to yieldingly hold the stud 69 in whichever of the notches of the detent lever Il the stud happens to be, but permits the lever T0 to be moved manually to shift the stud 69 for a purpose explained later. For the present, it will be assumed that the stud 69 is in the rearward position shown in Fig. 1. The slide 61, which occupies the position of Fig. 4 While the machine is at rest, has a slotted downward projection 15 engaging over a stud I6 on a side arm of a yoke 11 which is pivoted on a shaft 18 and is the yoke 279 of the Horton Patent 1,853,050. The yoke 'I'I carries a rod 8| normally engaged between forward projections 82 and 83 of a yoke 84 which corresponds to the part 286 of the Horton Patent 1,853,050 and is rockably and slidably mounted on the shaft 18 and rocked rst clockwise (Fig. 4) during the forward stroke and counterclockwise during the return stroke of each machine cycle and so normally rocks the yoke 1T likewise. As the yoke 1l is rocked clockwise it moves the slide 61 rearwardly so that the upturned rear end of the pawl 65 passes rearwardly of the stud 69 whereupon the spring 6B rocks the pawl 65 counterclockwise. The slide 61 and pawl 65 are moved sufficiently rearwardly so that the shoulder 19 on the pawl engages behind the lower end of the pawl 62 near the end of the forward stroke of the machine cycle, at about which time the printing mechanism of the machine, which is controlled by the yoke 11, operates to print. During the return stroke of the cycle, the counterclockwise movement of the yoke 11 moves the slide 61 and pawl 65 forwardly, rocking the pawl 62 sufficiently to disengage its upper end from the currently en gaged clip 6l and thus release the carriage for movement to the left by the spring 55. This occurs prior to the time that the stud 69 is engaged by the inclined cam edge of the pawl 65 and cams said pawl clockwise to disengage the shoulder T9 from the lower end of the pawl 62 which is thus released and permitted to be returned counterclockwise to its position of Fig. 4 in time to engage the next column stop clip 6I on the carriage, which is thus arrested in its next columnar position.

A stud 85 on a rearwardly projecting lug on the upper arm of the pawl 62 is engaged in a slot in a lever 86 (Fig. 1) pivoted on a stud 81 (Fig. 4) secured in the left-hand end portion of the frame 64 and urged counterclockwise by a spring 88 (Fig.

' 1), which thus also urges the pawl counterclockwise to the normal position of Figs. 1 and 4. A forwardly projecting portion of the lever 86 carries a roller 89 positioned behind the lower edge of a plate 90 extending lengthwise of the carriage and secured at its upper edge to a shaft 9i journaled at its ends in the carriage frame. A finger lever 92 is secured to the right end of the shaft 9| so that when the upper end of the lever 92 is pulled forwardly by the operator the blade 90 is rocked counterclockwise and rocks the lever 86 s E) Said lever, the notch being of sufficient width to permit the linger lever 92 to move far enough to rock the upper end of the pawl 62 rearwardly a short distance farther than the upper end of said pawl is rocked rearwardly in automatic tabulation during machine cycles. lIhe operator may also disengage the upper end of the pawl 62 by grasping the upper rear end of the lever 86 and rocking it clockwise and thereby rock the upperend ofr the pawl Si still farther rearwardly than is possible through manipulation of the linger lever 92. The result of this arrangement is that the paper carriage can automatically tabulate during successive machine cycles through certain .columnar positions determined by column stop clips 6| of the form shown in Fig. 4, but will not automatically tabulate past av columnar position determined by a column stop clip 6| having a medium sized rearward projection as shown at 'a in Fig. 5. However, when the operator desires that the carriage should tabulate past such a columnar position, the operator may pull iinger lever Q2 forwardly as far as permitted and thus move the upper end of the pawl |52 rearwardly of the rearward projection a on such column stop clip. However, in manipulating the ringer lever 92 to cause tabulation of the carriage, the operator is prevented from inadvertently moving the carriage beyond a columnar position determined by a column stop clip having a longer rearward projection as indicated at b in Fig. 5. But if, for any reason, it is desired to move the paper carriage beyond the latter columnar position, it is only necessary to grasp the lever 8S and directly rock it as far clockwise as possible to move the upper end of the pawl 62 out of the range of the long rearward projection b on the column stop clip.

Tabulation of the paper carriage may be manually disabled or normalized at any desired columnar position of the carriage by means of the lever 10. With the parts positioned as in Figs. 1 and 4, the paper carriage will, during successive machine cycles, automatically tabulate through a series of columnar positions determined by column stop clips l of the form shown in Fig. 4. However, if the lever is rocked clockwise from its Fig. 1 position, the stud 69 is moved forwardly into the forward notch in the detent 1| and yieldingly held in that position where it will engage the forward inclined edge 94 of the pawl 65 during each rearward movement of the slide 81 and pawl 65 and cam the pawl sufliciently clockwise to prevent engagement of its shoulder 19 with the lower end of the pawl 62 and thus prevent automatic rocking of the pawl 62 and tabulation of the paper carriage during the return stroke of the machine cycle.

The paper carriage carries a split platen comprising a right-hand portion Pr (Figs. 1 and 4) freely rotatably supported on the platen shaft |00 and a left-hand section PZ (Fig. 11) secured `to the platen shaft |00 to rotate therewith. A journal sheet or strip J (Figs 4 and 25) is passed around'the left-hand section PZ of the platen and line-spaced at appropriate times by automatic line-spacing mechanism. The yoke 11 (Fig. 4) carries a stud |0| engaging in a short slot |02 in a lever |03 pivoted on the shaft 18. The upper slotted end of the lever |03 receives a rod |04 supported at its ends on the lower ends of links |05 pivoted on a cross rod |06 (Fig. 1) of the carriage frame. A line-spacing pawl |01 pivoted on the end of the rod |04 is urged clockwise by a spring |08 (Fig. 4) tending to engagethe forward end 'of the pawl |01 with the teeth of the ratchet wheel |09 secured to theplaten shaft |00. However. the pawl |01 is normallyheld out o engagement with the ratchet wheel |09 by a stud |0 secured in the carriage frame and engaging a cam edge on the pawl which is so inclined that when the pawl |01 moves rearwardly during each. machine cycle, the stud would permit the point oi the pawl to engage the ratchet if the pawl were not otherwise blocked. A leverv pivoted on a stud ||2 secured in the carriage frame has a lateral extension forming a shield ||3 to control engagement of the pawl |01 with the ratchet |09. The lever is pivotally connected at its upper end with the forward end oi a link ||4 (Fig. 4) which is urged rearwardly by a spring l 5 to normally position the shield as in Fig. 4 so that it prevents engagement of the pawl |01 with the ratchet |09 during machine cycles. The link l i4 is connected at its rearward end to an arm lit secured on a shaft l1 which is journaled at its ends in the car,- riage frame and is also secured to the upper edge of a plate or blade IIB extending lengthwise of the carriage. A roller ||9 positioned behind the lower edge of the blade is carried on the'upper end of an arm |20 extending upwardly from a yoke l2 I pivoted on a rod |22 carried by a bracket |23 secured on the frame 94. The arm |20 yhas laterally extending cam arms |25 adapted to cooperate with one or more line-spacing control studs |26 carried by supporting blocks |21 ymounted on the stop bar 60. When the paper carriage moves into a columnar position where automatic line spacing of the journal sheet or strip is desired, a stud |26 engages one of the lateral cam `arms |25 ofthe arm |20 'and rocks the arm counterclockwise causing the roller l| I9 to rock the blade H3 and arm I'IE'clockwise and move the link H4 forwardly against the tension of its spring l5. The link |4 in turn rocks the lever I counterclock- Wise, moving the shield l i3 sufficiently rearwardly so that during the counterclockwise rocking of the yoke 11 and lever |03 during the return stroke of the next machine cycle performed while the r'paper carriage remains in that columnar position, the point of the pawl |01 will engage a tooth of the ratchet wheel |09 and rotate the ratchet wheel and platen shaft one line space clockwise. This advances the left-hand journal section Pl of the platen, which is iixed on the platen shaft |00, one line space.

Automatic line spacing of the right-hand or passbook section Pr of the platen is not required because as a rule only one line of entries will be made in a p-assbook at one time. Also, freely rctatably mounting the-right-hand or passbook section of the platen on the platen shaft facilitates the insertion of the passbook into the machine as it avoids the friction between the passbook and platen `which would result if this section of the platen were held against rotation as the passbook is inserted.

The passbook Al?. isinserted from the rear -of the platen and is guided forwardly under the platen by axed. guide plate |30 secured in the carriage frame. Forwardly of the iront edge of the guide plate |30, a second guide plate |3| secured on the plate 53 directs the leading edge ci' the passbook being inserted into a gripping device mounted on the carriageabove the right-hand sectionof the platen. This vgripping device cornprises a iixed plate |32 Asecured to a cross-shaft '|33 of the carriage frame and having, at the upper ends of its laterally edges, rearwardly turned ears |34esupporting studs 35 on which rearwardly bent lugs on the side arms |36 of `a passbook gripping bail |31 are pivoted. A spring |42 urges the bail |31 against the plate |32. A rearward extension of the lug on the right-hand side arm of the bail |31 pivotally supports a finger latch lever |38 having on its upper end a finger piece |39 and having its lower arm formed with a latch hook cooperating with a stud |40 xed in the right-hand side plate of the platen frame. A spring |4| connected at its upper end to a stud |43 on the lower arm of the nger latch lever |38 urges the latch lever clockwise in Fig. 4.

The full lines in Fig. 4 show the bail 31 in gripping position with the forward end of the latch hook on the nger latch lever |38 engaging against the rear side of the stud |40. When the operator moves the nger piece |39 rearwardly, the lever |38 is rst rocked clockwise about its point of engagement with the stud |40 and thus rocks the bail i 31 clockwise to the position shown in dot and dash lines in Fig. 4, the forward end |40 and nally moving under the stud,

:|31 in the open or passbook receiving position.

.-As the passbook is then inserted around the platen :its forward edge will be guided between the plate :|32 and bail |31.

After the passbook has been adjusted to the proper line position for the entry to be made, the

jpassbook holding bail 31 may be moved to clampiing position manually by pulling forwardly on 'the finger piece |39, whereby the lever |38 is :rocked counterclockwise about the stud |40 until Athe hook portion of the lever is moved from bcneath the stud |40, whereupon the spring |42 rocks the bail |31 against the passbook to grip `it against the plate |32. However, to relieve the `operator of the necessity of manually closing the passbook holder, a means has been provided for automatically unlatching the latch lever during the forward stroke of the machine cycle prior to printing.

A lever |45 pivoted on the stud |40 is connected with the lower end of the spring |4| and thus normally urged counterclockwise to the position shown in Fig. 4 where a rearward projection on said lever engages a stud |46 xed in the carriage frame. The lever |45 carries a stud |41 positioned in front of the lower end of the latch lever |38 so that when the latch lever is moved to latched position, where it holds the passbook holder in open or passbook receiving position, the lever |45 is rocked clockwise from its Fig. 4 position, thereby positioning the lower end of its downward extension |48 in engagement with the rear side of the rod |04. During the initial portion of the forward stroke of the next machine cycle, the rod |04 lmoving rearwardly rocks the lever |45 counterclockwise toward its Fig. 4 position and the stud |41 engaging the lower end of the latch lever |38 rocks the latter counterclockwise, disengaging it from the stud |40 and permitting the spring |42 to move the passbook gripping bail |31 to closed or passbook holding position.

The machine is provided with an electric drive of the kind disclosed in the Horton Patent 2,004,- 282. It has two motor bars as disclosed in the Butler Patent 1,992,142, an add motor bar |10 (Fig. 3) and a subtract motor bar |1|, the stems |12 and |13 of which are slotted to slide on fixed studs |14 and |15 secured in the machine fra-me and also slotted to receive studs |16 and |11 secured in a motor control slide |18 slidingly guided on the stud |14 and on a shaft |19. The motor control slide |18 has a rearwardly extending projection |80, the rearward end of which engages a stud |8| on a lever |82 pivotally mounted on the shaft |19 and connected through a spring |83 to the upper arm of the bell crank |84 secured to the shaft |19, the rear arm of said bell crank |84 having a lateral lug |85 projecting over the' top edge of the lever |82, whereby downward movement of the motor control slide by depression of either one of the motor bars causes the bell crank |84 and shaft |19 to be rocked clockwise through the spring |83. The motor bars are yieldingly held in normal undepressed position by springs |86 and |81 connected with the respective studs |14 and |15 and with studs |88 and |89 secured in the respective motor bar stems |12 and |13. The motor control slide is yieldingly held in its normal upper position by a spring |90 connected with a stud in said slide and. with the subtract motor bar stem |13. The shaft |19 is urged counterclockwise to its normal position by a spring |9| connected to a stud |92 secured in the machine frame and to a third arm |93 of the bell crank |84.

The shaft |19 corresponds to the shaft 56 ol the Horton Patent 2,004,282 and, through connections like those disclosed in said Horton patent, controls a switch in the electrical supply circuit of the drive motor (not shown) and also controls the drive clutch (not shown) which, through suitable connections, rotates a crank |95 (Fig. 11) corresponding to the crank 34 of the Horton patent. As in the Horton Patent 2,004,282, the crank |95 is connected through a link |98 to an arm |99 pivoted loosely on the shaft 200 and secured to a drive arm 20| also pivoted on the shaft 200. The arm 20| has a shoulder 202 adapted to cooperate with a shoulder 203 on a pawl 204 pivoted on a stud 205 carried by a full stroke sector 208 through which the operating parts of the machine are driven as disclosed in said Horton patent and in the Horton Patent 1,853,050. A spring 201 connected at one end to the pawl 204 and at its other end to a stud 208 on the full stroke sector 205 normally yieldingly holds the pawl in the effective position shown in Fig. 1l where the pawl will be entrained by the arm 20| as the arm is rocked clockwise (Fig. 1l) when the motor switch and drive clutch are engaged. The motor then drives the arm 20| and the full stroke sector 205 clockwise as viewed in Fig. l1 in the forward stroke of the machine cycle, but the full stroke sector and arm are returned counterclockwise to normal by springs as disclosed in the above-mentioned Horton patents in the return stroke of the machine cycle.

The drive connections will be disconnected at an early point in the clockwise movement of the arms |89 and 20| when the motor switch and clutch are connected while the machine is improperly conditioned in various ways as disclosed in said Horton patents. The disconnecting means comprises a plate 2|0 pivoted on a stud 2|| secured in the left-hand side plate of the machine frame and having a hook portion 2|2 which is normally in the path of a shoulder 2|3 on the pawl 204. The plate is formed with a slot 2|4 in which engages a stud 2|5 carried by the rear end of the rearwardly extending arm 2|0 of a lever 2|? pivoted on a shaft 2|8 carried by lugs depending from the forward end of the keyboard as disclosed in the Horton Patent 1,853,050. A swinging cross rod 220 is carried by the lever 2 l1 and by a link (not shown) supported on the righthand end of the shaft 2 I8, the rod 220 cooperating with the zero stops and key latch slides of the machine as described in detail in the Horton Patent 1,853,050. y

Briefly, when a cycle of the machine is initiated with the machine properly conditioned for operation, the lever 2|1 and the cross rod 22B will be swung rearwardly or clockwise as viewed in Fig. 11 during the initial portion of the machine cycle so that the stud 215 moving in the slot 2|fl in the plate 2 I6 will cam the plate 2li! counterclockwise and remove the hooked portion 212 of the plate from the path of the shoulder 2| 3 of the pawl 204 early enough to prevent disconnection of the motor drive from the full stroke sector 2l6 and general operating mechanism of the machine. If, however, a machine cycle is initiated with the machine improperly conditioned for operation, the cross rod 22|) and lever 2H are prevented from rocking sufficiently to remove the hooked portion 2|2 of the plate 2 [l from the path of the shoulder 2|3 on the pawl 2M so that before the full stroke sector and operating parts of the machine have been moved too far to permit them to be returned directly to normal position without Causing incorrect results or other diiculties due to failure to drive them through a full cycle of operation, the hooked portion 2|2 of the plate 2li) engages the shoulder 2|3 on the pawl 2M and rocks the latter counterclockwise and disengages its shoulder 293 from the shoulder 202 on the motor driven. drive arm 2li l, thus permitting the general operating mechanism of the machine and the full stroke sector' to be returned to normal by usual springs while the motor drive continues through the usual. cycle of operation before the clutch is disconnected and the motor switch opened. This disconnectible drive connection is utilized in the present invention in a manner which will be described in detail later.

The machine of the present invention has an adding and subtracting register substantially identical with that disclosed in the Butler Patent 1,992,142 and controlled in substantially the identical manner in adding and subtracting and positive and negative total-taking and subtotaltaking operations. This register comprises a line of pinions 225 (Fig. l1) each of which is constantly in mesh with a respective pinion of a line of pinions 22E, both lines of pinions being carried in tumbling frame 221 in which are secured two stub shafts 228 (Fig. 11) and 229 (Figs. 3 and 101 journaled in a main register frame 230 secured to a shaft 2li journaled in the machine frame, the axis of the stub shafts 228 and 229 being midway between the axes of the lines of pinions 225 and 226. As in said Butler patent the tumbling of the register from add position (Figs. 3 and l1) to subtract position and reversely is controlled by an arm 222 (Fig. 3) corresponding to the arm 39 of said Butler patent and adapted to be positioned to selectively block forward movement of either of two studs 233 anl 234 carried by arms 235 and (Fig. 3) secured on the right-hand stub shaft 229 of the register tumbling frame so that the frame 221' carrying the pinions will be tumbled as the main register [rame 230 is rocked to carry the register toward the actuator segments (Fig. l1). The arm 232 forms part of a yoke pivoted on a stud 239 secured in right-hand side plate of the machine frame having a stud and slot connection with a threearmed lever 24@ pivoted on a stud 24| secured in the machine frame so that counterclockwiso movement of the lever 24|) causes clockwise movement of the yoke 238 and arm 232, and counterclockwise movement of the yoke 238 and arm 232 causes clockwise movement of the lever 25|).

A forwardly extending arm 245 of the yoke 238 carries a stud 246 which is engageable by a rearwardly extending projection Ztl of the -lmotor bar stem |12 and the forwardly extending arm of the lever 240 carries a stud MS engageable by a rearward projection 259 of the motor bar stem |13, whereby depression of either the -lmotor bar or motor bar not only closes the motor switch and drive clutch but also sets the add-subtract register control arm 232 to position the register pinions 225 and 225 for an operation oi the algebraic sign corresponding to the or sign of the depressed motor bar.

Positive and negative totals and subtotals are taken from the register and printed in the same manner as in the machine of said Butler patent, the machine having total and subtotal keys T and .ST which are locked against depression when a negative total occurs in the add-subtract register by means of a negative total lock slide 266 (Fig. 3) which, as in said Butler patent, is controlled from the pinion of the highest order of the add-subtract register through a train of connections to the lever 26| secured on the end of the shaft 262, and cooperating with a projection 263 on the slide 260. Said shaft 262 and level` 26|) correspond to the parts numbered 121 and 122 of said Butler patent.

Figs. l and 3 show the parts in the positions they occupy when a positive total is contained in the register. At this time the negative total lock slide 26B, corresponding with the slide numbered 124 in said Butler patent, is so positioned that it does not prevent depression of either the total key T or the subtotal key ST but it does prevent depression of an overdraft release key OD. When a negative total occurs in the register, the slide 260 is moved forwardly to lock the total and subtotal keys T and ST against depression and unlock the key OD for depression. When the key OD is depressed, the lower end of the stem 265 thereof, engaging a lateral lug on the forward end of a lever 266 (Figs. 3 and 10) pivoted on the stud 24|, depresses said lever which has a rearward arm 261 which has a stud and slot connection with one arm of a yoke 268 which corresponds to the yoke 160 of the Butler Patent 1,992,142 and is pivoted on a rod 269 supported in the machine frame. The lever 266 also engages a stud 21D secured in the stem |13 of the motor bar and depresses said motor bar to give the machine a cycle of operation during which the add-subtract register is tumbled to subtracting condition. During this cycle a fugitive 1 is subtractively entered in the register by means controlled by said yoke 268.

As in said Butler patent, the subtractive entry of a fugitive l in the add-subtract register causes clockwise movement of a yoke 21| corresponding to the part numbered 213 in said Butler patent and pivoted on the rod 269. The yoke 21| is connected through a spring 212 with a second bell crank 213 pivoted on a stud 214, secured in the machine frame and, in moving clockwise, rocks the bell crank 213 counterclockwise. The bell crank 213 has a second arm 215 which thereupon moves the slide 26|) still farther forward to a position where it again locks the overdraft release key OD but no longer locks the total and subtotal keys T and ST so that, except for further means controlling the total and subtotal keys as hereinafter described. the 

